ArcticZ28

iTrader: (14)

Currently making 425/445 with my 408 N/A setup but the heads are out getting ported right now. I hope to make somewhere near 500 (or at the very least 475) when I get them back and everything bolted back up. Just wondering what plug/gap I should be using for this kind of power as I have been using TR6's. As you might notice, my power is a little below what it should be which has been assumed to be due to too low of a DCR with my cam, but it could be any number of things. Could the TR6's possibly be robbing me a bit of some hp? If they are the correct plug for this application, should I leave them at the stock gap of .035 or gap them higher? Just trying to find out the specifics for my particular setup.

staringback05

iTrader: (8)

ive heard of .038 being done before...

ArcticZ28

iTrader: (14)

I've seen a lot of people gap theirs to .038 but their setups have ranged from 375rwhp N/A to 600 on the juice. That doesn't really tell me much about what my setup in particular would work with best.

staringback05

iTrader: (8)

lol well damn...u might wait a bit for someone with ur exact setup...those plugs work fine, if it was a na motor id go with ac delco iriduims but thats here nor there...

daryl2cb@yahoo.com

iTrader: (2)

artic, thanks for the help. as far as plugs go, I run a .038, like you said for spray. what is your compression ratio? this is the major determining factor for your plug type and gap. If you are running a 11 to 1 ratio, I think I would be using the tr6's, if you are still in the mid to low tens, you might as well go back to the tr55's. I doubt the will be any power gain for it, like 1 hp maybe. Need some more info.

ArcticZ28

iTrader: (14)

I'll be running about 11.3:1 SCR with a DCR in the mid to high 7's.